دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a small-diameter conductive line used in electric wireline operations, such as electric well logging and perforating, in which the transmission of electrical current is required. Compare wireline.

n: A small-diameter wireline that carries electric current. This is used for logging tools and steering tools.

n: see electric well log.

n: the process of running an electric log. See electric well log.

n: Electric logs run on a wire line to obtain information concerning the porosity, permeability, density, and/or fluid content of the formations drilled. The drilling-fluid characteristics may need to be altered to obtain good logs.



a method of rock and fluid identification or evaluation that began in 1927. The first log was run by Conrad Schlumberger.

n: see electric well log.

n: a record of certain electrical charac-teristics (such as resistivity and conductivity) of forma-tions traversed by the borehole. It is made to identify the forma-tions, determine the nature and amount of fluids they contain, and estimate their depth. Also called an electric log or electric survey.

n: an electric well log in which the conductivity of the formation rather than the resistivity is measured. Because oilbearing formations are less conductive of electricity than water-bearing formations, an induction survey, when compared with resistivity readings, can aid in determination of oil and water zones.

n: the recording of the resistance of formation water to natural or induced electrical current. The mineral content of subsurface water allows it to conduct electricity. Rock, oil, and gas are poor conductors. Resistivity measurements can be correlated to formation lithology, poros- ity, permeability, and saturation and are very useful in formation evaluation. See electric well log.

n: a kind of logging method in which the resistivity of rock is measured, usually used to evaluate the formation oiliness

(pronounced slumberjay") n: one of the pioneer companies in electric well logging, named for the French scientist who first developed the method. Today, many companies provide logging services of all kinds.

n: 1. in electric well logging, refers to the distance between electrodes on a logging tool. Electrode spacing affects the depth of investigation of the tool into the formation. 2. see well spacing.

n: The distance between sources and receivers, particularly in logging tools.

the distance between well producing in the same reservoir. The spacing is actually the area they drain (e.g., 320, 160 or 40 acres).

n: (SP) a measurement of the electrical currents that occur in the wellbore when fluids of different salinities are in contact. The SP curve is usually recorded in holes drilled with freshwater- base drilling fluids. It is one of d1e curves on an electric well log. Also called self-potential curve.